Question

number of mole in 3.6g of ammonia

Answer 1

Gram molecular mass of ammonia is 17 g
therefore 17 g ammonia consists = 1 mole
3.6 g ammonia consists                = 1/17 * 3.6 = 0.2117 moles

Answer 2

molecular mass of ammonia=17 g
17g=1 mole
3.6g=(1/17)*3.6=answer
solve this and get answer.